/* Reset básico */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #f5f7fa, #c3cfe2);
  color: #333;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.encabezado {
  width: 100%;
  background-color: #ffffff;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  padding: 10px 20px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.logo img {
  max-height: 60px;
  object-fit: contain;
}

.contenedor {
  background-color: #ffffff;
  margin-top: 30px;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  max-width: 400px;
  width: 90%;
  text-align: center;
}

h1 {
  margin-bottom: 15px;
  color: #2c3e50;
}

p {
  margin-bottom: 20px;
  font-size: 16px;
  color: #555;
}

select, button {
  width: 100%;
  padding: 12px 15px;
  font-size: 16px;
  margin: 10px 0;
  border-radius: 8px;
  border: 1px solid #ccc;
}

button {
  background-color: #2980b9;
  color: white;
  font-weight: bold;
  border: none;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #1f6391;
}

/* Responsivo */
@media (max-width: 600px) {
  .contenedor {
    padding: 20px;
  }

  .logo img {
    max-height: 50px;
  }

  select, button {
    font-size: 15px;
  }
}